diff --git a/Yep/AppDelegate.swift b/Yep/AppDelegate.swift
index 5c0f32cf..e5106321 100644
--- a/Yep/AppDelegate.swift
+++ b/Yep/AppDelegate.swift
@@ -93,9 +93,11 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     }
     
     func application(application: UIApplication, performFetchWithCompletionHandler completionHandler: (UIBackgroundFetchResult) -> Void) {
+
         syncUnreadMessages() {
             completionHandler(UIBackgroundFetchResult.NewData)
         }
+        
     }
 
     // MARK: APNs
@@ -119,12 +121,12 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
         println("didReceiveRemoteNotification: \(userInfo)")
 
         if let v1AccessToken = YepUserDefaults.v1AccessToken() {
-            APService.handleRemoteNotification(userInfo)
-
+            
             if let type = userInfo["type"] as? String {
                 if type == "message" {
                     syncUnreadMessages() {
-                        
+                        completionHandler(UIBackgroundFetchResult.NewData)
+                        APService.handleRemoteNotification(userInfo)
                     }
                 }
             }
diff --git a/Yep/Services/YepService.swift b/Yep/Services/YepService.swift
index 740367f8..1fad2ef5 100644
--- a/Yep/Services/YepService.swift
+++ b/Yep/Services/YepService.swift
@@ -961,7 +961,7 @@ func sendMessageWithMediaType(mediaType: MessageMediaType, inFilePath filePath:
 
 func markAsReadMessage(message: Message ,#failureHandler: ((Reason, String?) -> Void)?, #completion: (Bool) -> Void) {
 
-    if message.readed || message.messageID.isEmpty || message.downloadState != MessageDownloadState.Downloaded.rawValue {
+    if message.readed || message.messageID.isEmpty {
         return
     }
 
diff --git a/Yep/Services/YepServiceSync.swift b/Yep/Services/YepServiceSync.swift
index b9699fce..d150ba29 100644
--- a/Yep/Services/YepServiceSync.swift
+++ b/Yep/Services/YepServiceSync.swift
@@ -365,7 +365,8 @@ private func syncGroupWithGroupInfo(groupInfo: JSONDictionary, inRealm realm: RL
 func syncUnreadMessagesAndDoFurtherAction(furtherAction: () -> Void) {
     unreadMessages { allUnreadMessages in
         //println("\n allUnreadMessages: \(allUnreadMessages)")
-
+        println("Got unread message \(allUnreadMessages.count)")
+        
         dispatch_async(realmQueue) {
 
             let realm = RLMRealm.defaultRealm()
diff --git a/Yep/ViewControllers/Conversation/ConversationViewController.swift b/Yep/ViewControllers/Conversation/ConversationViewController.swift
index 9f97f17c..bd60644c 100644
--- a/Yep/ViewControllers/Conversation/ConversationViewController.swift
+++ b/Yep/ViewControllers/Conversation/ConversationViewController.swift
@@ -18,7 +18,7 @@ class ConversationViewController: UIViewController {
         return messagesInConversation(self.conversation)
         }()
 
-    let messagesBunchCount = 12 // TODO: 分段载入的“一束”消息的数量
+    let messagesBunchCount = 50 // TODO: 分段载入的“一束”消息的数量
     var displayedMessagesRange = NSRange()
 
 
@@ -401,11 +401,11 @@ class ConversationViewController: UIViewController {
 
         // 初始时移动一次到底部
         if !conversationCollectionViewHasBeenMovedToBottomOnce {
-            conversationCollectionViewHasBeenMovedToBottomOnce = true
+            
 
             // 先调整一下初次的 contentInset
             setConversaitonCollectionViewOriginalContentInset()
-
+            
             if displayedMessagesRange.length > 0 {
                 conversationCollectionView.scrollToItemAtIndexPath(NSIndexPath(forItem: displayedMessagesRange.length - 1, inSection: 0), atScrollPosition: UICollectionViewScrollPosition.Bottom, animated: false)
             }
@@ -969,7 +969,12 @@ extension ConversationViewController: UICollectionViewDataSource, UICollectionVi
 
         }
     }
-
+    
+    override func viewDidAppear(animated: Bool) {
+        super.viewDidAppear(animated)
+        conversationCollectionViewHasBeenMovedToBottomOnce = true
+    }
+    
     // MARK: UIScrollViewDelegate
 
     func scrollViewDidScroll(scrollView: UIScrollView) {
diff --git a/Yep/Views/Cells/Conversation/ConversationCell.swift b/Yep/Views/Cells/Conversation/ConversationCell.swift
index c900452d..9e375129 100644
--- a/Yep/Views/Cells/Conversation/ConversationCell.swift
+++ b/Yep/Views/Cells/Conversation/ConversationCell.swift
@@ -87,8 +87,20 @@ class ConversationCell: UITableViewCell {
                         }
                     }
                 }
-
-                self.chatLabel.text = latestMessage.textContent
+                switch latestMessage.mediaType {
+                    
+                case MessageMediaType.Audio.rawValue:
+                    self.chatLabel.text = "[声音]"
+                case MessageMediaType.Video.rawValue:
+                    self.chatLabel.text = "[视频]"
+                case MessageMediaType.Image.rawValue:
+                    self.chatLabel.text = "[图片]"
+                case MessageMediaType.Text.rawValue:
+                    self.chatLabel.text = latestMessage.textContent
+                default:
+                    break
+                    
+                }
                 self.timeAgoLabel.text = latestMessage.createdAt.timeAgo
 
             } else {